William k doen



A.L .DORN

DOOR SIGNAL.

(No Model.)

Patents 2d Sept. 9, 1884.

m m nu 1 WITNESSES INVENTOR ATTORNEYS.

N. PEYERS Pholo-Ulhngnphan Washingtun. D. c.

V UNITED STATES PATENT omcr.

ALONZO L. DORN, or CHICAGO, ILLINOIS, ASSIGNOR or ONE'HALF TO WILLIAM1v. DORN.

DOOR-SIGNAL.

SPECIFICATION forming part of Letters Patent No. 304L803, datedSeptember 9, 1884:.

- Application filed November 12, 1883. (No model.)

To all whom it may concern.-

Be it known that I, ALQNZO L. DORN, of Chicago, in the county of Cookand State of Illinois, have invented a new and Improved DoorSignal, ofwhich the following is a full, clear, and exact description.

My invention consists of a contrivanee to disclose a word-signal and tosound a bell or other equivalent device in connection with theunlatching-wire extending from the front door to the interior or upperportion of the house as now used in flats for unlatching the door toadmit people without descending the stairs, the said signals being tonotify those desiring to enter of the unlatehing of the door, all ashereinafter fully described.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure l is an interior elevation of a door having my improved signaldevice attached. Fig. 2 is an exterior front elevation of the door. Fig.3 is a rear or inside elevation of the signal device, and Fig. 4 isasectional clevation of Fig. 3 on an enlarged scale.

I attach a small metallic case, a, to the exterior surface of the frontdoor, 0, having an opening, 0, through the upper portion. which will inpractice be suitably glazed, and a little back of the front plate, andbehind said opening, Iflgure the words Come in, or any equivalentword-sign, on a plate, d, between which and the case a, I arrange aslide, a, to hide the words when the door is latched, said slide beingarranged to work up and down in guideways f, and also being connected toa rod, z, passing through a spring, 0, contained in a telescopic orother equivalent casing, g h, one section of which casing is attached toplate a, so that when the spring isallowed to expand it will shift theslide up between the words and the glazed opening 0 and conceal thewords. The rodi of the spring is connected, by a chain or wire, j,passing through the door, with the wire 70, which is connected with thedoor-latch Z, and extends to the room, where'it is to be used forunlatching the door to admit people ringing the door-bell foradmittance. The chain j passes under a guidepulley, m, before connectingwith said wire, so that when said wire is pulled the spring 0 will becompressed and the slide 0' will be pulled from before the word-signalto expose it to view; but for a signal by sound to attract the attentionof persons who may fail to see the word-signal, I also propose toconnect a bell, or, also located in the case a, with the spring 0 orcasing g h, to be pulled at the same time, and thus make certain ofgiving due 11otice of the unlatehing of the door.

The words sign may be arranged in any approved or with the latch Z andthe wire or rod is, con-' nected to the latch, said spring beingattached to the door and interposed between the latchrod 70, and thewire 8 extending from the spring over guide-pulley 2. on the door-jamb,and thence to any one of a series of rooms or flats, and in practicehaving branches to the rest, so that .the latch and the signal may beworked from any one of the flats or series of rooms alike. The springs qand the rodk slide the latch-bolt and fasten the door again after beingunlatched.

The wire or chain j may be connected with rod is or wire 8 either sideof the spring q; but I prefer to connect it with the wire 8 on thedistal side of the spring from the latch.

I propose to use this latch-operating spring device either with orwithout the signal attachment, and will also attach a bell, a, to theinside of the door and connect it with rod 75 or wire 8, to be used withor without the signal device of case a.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The combination of a signal device with the door b and theunlatching-wire It, said signal device being arranged to be worked forgiving the signal by said wire when pulled to unlatch the door,substantially as described.

2. The signal-case a, containing the wordsignal (I e, and spring 0,attached to the door b,

5. The combination of signal-bell a, incased telescopic or equivalentspring q, rod is, and pull-Wire s, substantially as described. 15

6. The combination of case a and its signal devices, wire j, and bell u,with the latch Z, rod 76, telescopic or equivalent ineased spring q, andpull-wire s, substantially as described.

ALONZO L. DORN.

WVitnesses BENJAMIN O. Dorm, YVM. ZIMMERMAN.

